Guernsey vs Jersey

Jersey is 51% larger than Guernsey. Guernsey would fit into Jersey about 1.5 times.

GuernseyJerseyGuernsey moved onto Jersey · Equal-area projection
0.66×
Guernsey is 0.66× the area of Jersey. Put the other way, Jersey is 1.51× the size of Guernsey.
GuernseyJersey
Area78 km²118 km²
Population67,787103,267
Density869 / km²875 / km²
CapitalSaint Peter PortSaint Helier
RegionNorthern EuropeNorthern Europe
CoastlineHas a coastHas a coast
Neighbours00

Why the map you grew up with disagrees

On a Mercator map, area grows with distance from the equator. Guernsey sits at about 49°N and is stretched to 2.37× its true area; Jersey at 49° N is stretched to 2.34×. Here the two are distorted about the same amount, so Mercator gets this pair roughly right. The figure above uses the Equal Earth projection, where every square kilometre is drawn the same size.

Questions about this pair

Is Guernsey bigger than Jersey?
No. Guernsey is 34% smaller than Jersey. Guernsey covers 78 km² and Jersey covers 118 km².
How many times does Guernsey fit into Jersey?
About 1.5 times: Jersey has 1.51× the area of Guernsey.
Why do Guernsey and Jersey look different on Google Maps?
Web maps use the Mercator projection, which stretches area with distance from the equator. Guernsey is drawn about 2.37× its true area there and Jersey about 2.34×. For this pair the distortion is similar, so Mercator gets the comparison roughly right. Kartavera uses Equal Earth, where every square kilometre is drawn the same size.
Which has more people, Guernsey or Jersey?
Jersey: 103,267 people against 67,787. Density: Guernsey 869 per km², Jersey 875 per km².